Method for inducing uniaxial magnetic anisotropy in an amorphous ferromagnetic alloy

摘要

Through the practice of this invention there is achieved control of the vibrational frequency of an electromechanical oscillator. This is achieved by utilizing the change in Young's modulus of elasticity which occurs for certain materials with applied magnetic field, known as the . DELTA.E-effect. By selective annealing in the presence of specially directed magnetic field, the &Dgr;E-effect is selectively altered along specific directions in the vibrational member. Additionally, by control of the &Dgr;E-effect of a sonic delay line, there is achieved control of the delay time for an acoustic pulse propagating therein.